[Bug 102343] New: Screen remains black after opening lid on Asus T102HA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102343

            Bug ID: 102343
           Summary: Screen remains black after opening lid on Asus T102HA
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: ambrop7 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 133649
  --> https://bugs.freedesktop.org/attachment.cgi?id=133649&action=edit
System log (includes kernel log)

On Asus T102HA the display works at first, when I close the lid it turns off
but never turns back on when I open the lid. There is no backlight and I also
do not see anything displayed when looking at the screen under external
illumunation. This happens every time, with and without X running.

Backlight control (/sys/class/backlight/intel_backlight/brightness) otherwise
works before this issue occurs, after this changing the brightness has no
visible effect.

This happens regardless of whether the keyboard is electrically attached via
its USB connection. It is possible to "close" the lid (keyboard) without
attaching it as the open/closed detection uses a different mechanism. The logs
attached are with the keyboard not attached as that avoids some USB related
spam.

Attached are:
- The system log, produced using drm.debug=0x1e . It includes kernel and Xorg
logs, and "Lid closed" and "Lid opened" from logind can also be seen.
- intel_reg dump --all

I could not dump VBIOS, I get Input/Output error when trying to "cat" the rom
and an error in dmesg (i915 0000:00:02.0: Invalid PCI ROM header signature:
expecting 0xaa55, got 0xa243).

Kernel version: 4.13.0-rc4
Distribution: NixOS (unstable)

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